README: LLM development disclaimer

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -282,3 +282,21 @@ GPL-3.0-or-later — see [LICENSE](LICENSE).
   best-effort); PNGs are always saved regardless.
 - **Result seems too low/high**: remember the model is fills + barrels
   only, with ideal contacts; measure electrode-to-electrode.
+
+## LLM disclaimer
+
+This plugin was developed with an LLM — Anthropic's **Claude** (Claude
+Code, model Claude Fable 5). The physics model, solver, tests, tooling
+and this documentation (including the figures, which are generated by
+the solver itself) were written by the model, feature by feature, under
+human direction and review (janik / B4L); commits carry a
+`Co-Authored-By: Claude` trailer.
+
+What keeps this honest: the test suite pins the numerics to exact
+analytic references (strip and annulus resistances, the acosh spreading
+resistance of two circular contacts, skin-effect limits, power-balance
+identities) and to convergence/regression checks — run it with
+`pytest tests`. Nevertheless, an LLM wrote this: read *Model & limits*
+critically, treat surprising numbers with the usual engineering
+suspicion, and cross-check against a hand estimate before trusting a
+result with hardware. Bug reports are very welcome.